1983-1987 GMC B6P042 SERVICE BRAKES, AIR:DRUM:CHAMBER

1983-1987 GMC B6P042 SERVICE BRAKES, AIR:DRUM:CHAMBER (Change Vehicle)

The following SERVICE BRAKES, AIR:DRUM:CHAMBER recall/defect on 1983-1987 GMC B6P042 vehicles was reported to the National Highway Traffic Safety administration on 1987-08-03. For more information contact the National Highway Traffic Safety administration or the US Department of Transportation. See recall summary below.

Build Years/Makes/Models:	1983 - 1987 GMC B6P042 1983 - 1987 CHEVROLET B6P042
UNits affected:	7870
Recall Number:	87V121000
Summary:	SEVERE BRAKE CHATTER MAY CAUSE THE BRAKE CHAMBER MOUNTING BRACKETS ON EITHER SIDE TO DEVELOP CRACKS IN THE WELD AREA WHERE THE S CAM SHAFT TUBE ATTACHES TO THE CHAMBER SUPPORT SECTION.
Consequence:	BRACKETS CAN BREAK, RESULTING IN LOSS OF BRAKING ABILITYAT THAT FRONT WHEEL, AND POSSIBLY RESTRICTED STEERING, WHICH COULD LEAD TO AVEHICLE CRASH WITHOUT PRIOR WARNING.
Remedy:	AS NECESSARY, INSTALL NEW REINFORCED FRONT BRAKE CHAMBER MOUNTING BRACKETS AND INSTALL A FRONT BRAKE LIMITING VALVE ON VEHICLES WITHOUT ONE.
Notes:	SYSTEM: BRAKESVEHICLE DESCRIPTION: SCHOOL BUSES EQUIPPED WITH 7,500 LB. FRONT AXLE AND MEDIUMDUTY TRUCKS EQUIPPED WITH A 7,000 LB. FRONT AXLE.
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